Non UL: Water Splitting Artificial Leaf

MIT professor Daniel Nocera claims to have created an artificial leaf made from stable and inexpensive materials that mimics nature's photosynthesis process.

The device is an advanced solar cell, no bigger than a typical playing card, which is left floating in a pool of water. Then, much like a natural leaf, it uses sunlight to split the water into its two core components, oxygen and hydrogen, which are stored in a fuel cell to be used when producing electricity.